Claims-based identity is a means of authenticating an end user, application or device to another system in a way that abstracts the entity's specific information while providing data that authorizes it for appropriate and relevant interactions.
Deprovisioning is the process of removing access to a system from an end user who will no longer be utilizing that system.
An orphan account, also referred to as an orphaned account, is a user account that can provide access to corporate systems, services and applications but does not have a valid owner.
Single sign-on (SSO) is a session and user authentication service that permits a user to use one set of login credentials (e.g., name and password) to access multiple applications.
In a Windows environment, a user profile is a record of user-specific data that define the user's working environment.